If you're a fan of technology, chances are you've retired a few gadgets over the years and they're sitting in a box in your closet. Today's the day to dig out your leftovers and start thinking about what you can do to let them live and breathe again. Here are ten of our favorite ideas to get you started.

10. Repurpose Your Old Computer in Many, Many Ways

Repurposing an old computer is awesome but it's obvious, so let's get this one out of the way first. There is so much you can do. Laptops can become tablets, desktops can become powerful storage devices, and much more. Old computers are just slow computers with an outdated selection of ports, less storage and RAM, and generally paltry graphics cards. All you need is something else that has those minimal requirements and there's plenty you can do. Web servers, media centers, retro arcades, a kitchen computer that can get a little messy because it's old and you don't care,

The digital photo frame is something we've all gotten as a gift or bought with hopes that it was going to take us into the future of photo displaying. In the end, I think most of us feel like we were sold storage box filler. If you actually use a digital picture frame, you get the added bonus of paying more money for it for the rest of time. These things draw a reasonably large amount of power for something nobody is looking at most of the time, especially considering their analog predecessors—you know, normal picture frames—don't have that downside and can still display whatever photo you want. I could go on complaining about the downsides of spending tens of dollars on one of these basically pointless devices, but let's not and focus on the positive instead.

You don't want to be running your digital picture frame 24/7 (unless you love paying for wasted energy), so your best bet is to start looking at the thing as a device for specific events. Instead of loading it up with photos, stock your frame's internal storage (or SD card) with art that you like. If it can play video, put music videos on it or just find some awesome motion graphics on Vimeo (that's what I did). Hook it up during a party and you've got something cool to display (instead of photos of your tame vacation to Southern Florida). If it handles audio, too, hook up some speakers and you'll essentially have an audio-visual party mix.

8. Make a Clock, Smartphone Stand, or Laser Show with a Dead Hard Drive

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7. Lose an Old Laptop, Gain a Second Monitor

Yeah, yeah, we've technically looked at things you can do with an old computer but those were all things that didn't involve taking them apart and actually turning them into new things. If you've got an old laptop that you never use but wouldn't mind having a second display for your desktop computer (or newer laptop), you're in luck! This Instructables post will teach you how to take your laptop apart and make the display usable with another computer. You could even use the bottom half of your laptop to do any of the old computer uses we mentioned earlier. It's a win-win.

6. Create the Best Keychain Ever with Old Cables

While old cables are nice to have around in case you need them someday, there isn't much you can do to repurpose them into something better. Nonetheless, there is one really awesome option: the Ethernet cable keychain. (See the photo to the right if you're not sure why this is so awesome). Technically you could do this with other types of cables, but Ethernet has the distinct advantage of being both thick and locking into its port. Other cables might not hold the weight of your keys or stay in quite as well.

The last time we talked NES hardware with you, it was a tip on how to repair a broken pin connector …
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4. Use Those Unused Ports on Your TV to Charge Your Phone, Set up a Security Camera, and More!

The ports on the back of your TV are often under-appreciated. Most of us plug in an HDMI box or two and call it a day, but the old school ports (and even some newer ones) let you do all sorts of neat things. The service USB port on most flatscreens is one of the most fun, allowing you to power all sorts of USB devices. This means you can plug in backlighting, or charge your smartphone or game controller. Video out ports can output what's on your television to another monitor or device so you can view from multiple locations or record what you're watching. A port or two on your television can probably host live video input from a camera you own, which can work as a makeshift security monitor or even a fun display at a party. For a whole bunch of ideas, and a primer on all the ports you've got, check out this post.

3. Turn Your Router into a Wireless Radio

Although I've been with the same router for four years now (aww), before I decided to settle down with my DD-WRT-ed LinkSys 310N I went through routers like toilet paper. If I hadn't given them all new homes before learning I could turn one of them into a wireless radio, I'd have done that in a heartbeat. Although this is one of the more complex DIY projects you can take on, it's also one of the coolest. Just check out the video to the left to learn how it's done. It's definitely a weekend project, but when you're done you'll have a wireless radio for the price of a router you weren't even using.

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2. Use a Mobile Device as a Dedicated VOIP Phone

iPod touches make great iPhones when you add Skype, or any other VOIP service, to their array of apps, but any old device will do. Even if you've got a tablet you're not using anymore it can make a great phone (if you add a headset). Just keep it around the house and you've got a great makeshift home phone line (especially when you get Google Voice involved). Tablets also make great video conferencing devices (assuming they're sporting cameras). If you'd rather not sell yours because it isn't worth much anymore, use it solely for communication. It's remarkably helpful if you don't get great (or any) cellular service in your home.

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1. Upgrade Your Crappy Headphones

When you're spending under $50 on headphones you're generally not going to get the greatest pair, but there is a lot you can do to make them worth far more than their price tag. Replacing the drivers yourself can net you audiophile-level sound on the cheap. You can also splice them with a headset to give them a few extra superpowers or even turn them into a noise-isolating headset (in some cases). If you've got a crappy pair and some time, these upgrades will give you a better sound and features without the associated cost.